DD's birthday party is on Saturday. She's taking a few friends swimming then back to ours for tea and sleepover.
Child A's mother accepted the invitation some time ago. Last night DD said that Child A had said at school that eithr (1) she couldn't come to DD's party at all any more because she'd been invited to Child B's party and the times overlapped; or (2) she could come to DD's party but only the swimming and not the tea because straight after swimming she had to go off to Child B's party (DD wasn't sure which).
I texted the mother asking whether Child A was still coming and she just rang to say yes, Child A has been asked to this other party which is a [ACTIVITY] party and she's never done [ACTIVITY] and really wants to go but it's at 4pm (we'll probably get back from swimming around then). I just said well we will probably be back in tome for you to pick her up at 4pm but I can't guarantee it, so you'll have to let me know. She said that's fine, we'll collect her as soon as you get back.
Now I am really annoyed because (1) I think this incredibly rude (2) I am pissed off with myself for not just saying "it's one or the other" and (3) I am appalled that any parent would give their child the message that it's OK to just chop and change when you have already accepted an invitation, because a better one comes along.
AIBU? And should I phone back and tell the parents that actually we might not get back in time so if Child A really prefers [ACTIVITY] party then best not come to ours?